package edu.princeton;

/*************************************************************************
 *  Compilation:  javac Out.java
 *  Execution:    java Out
 *
 *  Writes data of various types to: stdout, file, or socket.
 *
 *************************************************************************/

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.Locale;

/**
 * This class provides methods for writing strings and numbers to various output
 * streams, including standard output, file, and sockets.
 * <p>
 * For additional documentation, see <a
 * href="http://introcs.cs.princeton.edu/31datatype">Section 3.1</a> of
 * <i>Introduction to Programming in Java: An Interdisciplinary Approach</i> by
 * Robert Sedgewick and Kevin Wayne.
 */
public class Out {

	// force Unicode UTF-8 encoding; otherwise it's system dependent
	private static final String UTF8 = "UTF-8";

	// assume language = English, country = US for consistency with StdIn
	private static final Locale US_LOCALE = new Locale("en", "US");

	private PrintWriter out;

	/**
	 * Create an Out object using an OutputStream.
	 */
	public Out(OutputStream os) {
		try {
			OutputStreamWriter osw = new OutputStreamWriter(os, UTF8);
			out = new PrintWriter(osw, true);
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	/**
	 * Create an Out object using standard output.
	 */
	public Out() {
		this(System.out);
	}

	/**
	 * Create an Out object using a Socket.
	 */
	public Out(Socket socket) {
		try {
			OutputStream os = socket.getOutputStream();
			OutputStreamWriter osw = new OutputStreamWriter(os, UTF8);
			out = new PrintWriter(osw, true);
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	/**
	 * Create an Out object using a file specified by the given name.
	 */
	public Out(String s) {
		try {
			OutputStream os = new FileOutputStream(s);
			OutputStreamWriter osw = new OutputStreamWriter(os, UTF8);
			out = new PrintWriter(osw, true);
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	/**
	 * Close the output stream.
	 */
	public void close() {
		out.close();
	}

	/**
	 * Terminate the line.
	 */
	public void println() {
		out.println();
	}

	/**
	 * Print an object and then terminate the line.
	 */
	public void println(Object x) {
		out.println(x);
	}

	/**
	 * Print a boolean and then terminate the line.
	 */
	public void println(boolean x) {
		out.println(x);
	}

	/**
	 * Print a char and then terminate the line.
	 */
	public void println(char x) {
		out.println(x);
	}

	/**
	 * Print an double and then terminate the line.
	 */
	public void println(double x) {
		out.println(x);
	}

	/**
	 * Print a float and then terminate the line.
	 */
	public void println(float x) {
		out.println(x);
	}

	/**
	 * Print an int and then terminate the line.
	 */
	public void println(int x) {
		out.println(x);
	}

	/**
	 * Print a long and then terminate the line.
	 */
	public void println(long x) {
		out.println(x);
	}

	/**
	 * Print a byte and then terminate the line.
	 */
	public void println(byte x) {
		out.println(x);
	}

	/**
	 * Flush the output stream.
	 */
	public void print() {
		out.flush();
	}

	/**
	 * Print an object and then flush the output stream.
	 */
	public void print(Object x) {
		out.print(x);
		out.flush();
	}

	/**
	 * Print an boolean and then flush the output stream.
	 */
	public void print(boolean x) {
		out.print(x);
		out.flush();
	}

	/**
	 * Print an char and then flush the output stream.
	 */
	public void print(char x) {
		out.print(x);
		out.flush();
	}

	/**
	 * Print an double and then flush the output stream.
	 */
	public void print(double x) {
		out.print(x);
		out.flush();
	}

	/**
	 * Print a float and then flush the output stream.
	 */
	public void print(float x) {
		out.print(x);
		out.flush();
	}

	/**
	 * Print an int and then flush the output stream.
	 */
	public void print(int x) {
		out.print(x);
		out.flush();
	}

	/**
	 * Print a long and then flush the output stream.
	 */
	public void print(long x) {
		out.print(x);
		out.flush();
	}

	/**
	 * Print a byte and then flush the output stream.
	 */
	public void print(byte x) {
		out.print(x);
		out.flush();
	}

	/**
	 * Print a formatted string using the specified format string and arguments,
	 * and then flush the output stream.
	 */
	public void printf(String format, Object... args) {
		out.printf(US_LOCALE, format, args);
		out.flush();
	}

	/**
	 * Print a formatted string using the specified locale, format string and
	 * arguments, and then flush the output stream.
	 */
	public void printf(Locale locale, String format, Object... args) {
		out.printf(locale, format, args);
		out.flush();
	}

	/**
	 * A test client.
	 */
	public static void main(String[] args) {
		Out out;

		// write to stdout
		out = new Out();
		out.println("Test 1");
		out.close();

		// write to a file
		out = new Out("test.txt");
		out.println("Test 2");
		out.close();
	}

}
